If anyone can help, it would be appreciated:

Platform: .net

localy all works fine.
When published,
small files works fine.
larger files (up to 15MB) progress bar runs fast, than sometimes hang, sometimes uploadCompleted event fires, but, file does not show in server.
even larger files (20-150MB), IO Error #2038

Please let me know what you think. debug info below for 25MB file:
----- SWFUPLOAD SETTINGS ----
ID: undefined
upload_url: http://www.domain.com/UploadCompleted.aspx
file_post_name: Filedata
post_params: {
ASPSESSID: vaqoz045ecq3jg55uc22lv55
}
file_types: *.qt;*.mov;*.avi;*.mpg;*.mpeg;*.mp4;*.m4v;*.3gp;*.3gpp;*.3g2;*.3gpp2;*.wmv;*.asf;*.mod;*.flv
file_types_description: Video Files
file_size_limit: 2048000
file_upload_limit: 1
file_queue_limit: 0
flash_url: http://www.domain.com/swfUpload/swfupload_f9.swf
flash_width: 1px
flash_height: 1px
flash_color: #FFFFFF
debug_enabled: true
----- SWFUPLOAD SETTINGS END ----

SWF DEBUG: SWFUpload Init Complete
SWF DEBUG:
SWF DEBUG: ----- SWF DEBUG OUTPUT ----
SWF DEBUG: Build Number: SWFUPLOAD 2.0.2 FP9 2008-01-07 0001
SWF DEBUG: movieName: SWFUpload_0
SWF DEBUG: Upload URL: http://www.domain.com/UploadCompleted.aspx
SWF DEBUG: File Types String: *.qt;*.mov;*.avi;*.mpg;*.mpeg;*.mp4;*.m4v;*.3gp;*.3gpp;*.3g2;*.3gpp2;*.wmv;*.asf;*.mod;*.flv
SWF DEBUG: Parsed File Types: qt,mov,avi,mpg,mpeg,mp4,m4v,3gp,3gpp,3g2,3gpp2,wmv,asf,mod,flv
SWF DEBUG: File Types Description: Video Files (*.qt;*.mov;*.avi;*.mpg;*.mpeg;*.mp4;*.m4v;*.3gp;*.3gpp;*.3g2;*.3gpp2;*.wmv;*.asf;*.mod;*.flv)
SWF DEBUG: File Size Limit: 2097152000 bytes
SWF DEBUG: File Upload Limit: 1
SWF DEBUG: File Queue Limit: 1
SWF DEBUG: Post Params:
SWF DEBUG: ASPSESSID=vaqoz045ecq3jg55uc22lv55
SWF DEBUG: ----- END SWF DEBUG OUTPUT ----
SWF DEBUG:
Flash called back and is ready.
SWF DEBUG: Event: fileDialogStart : Browsing files. Multi Select. Allowed file types: *.qt;*.mov;*.avi;*.mpg;*.mpeg;*.mp4;*.m4v;*.3gp;*.3gpp;*.3g2;*.3gpp2;*.wmv;*.asf;*.mod;*.flv
SWF DEBUG: Select Handler: Files Selected from Dialog. Processing file list
SWF DEBUG: Event: fileQueued : File ID: SWFUpload_0_0
SWF DEBUG: Event: fileDialogComplete : Finished adding files
SWF DEBUG: StartUpload(): Starting Upload: First file in queue
SWF DEBUG: StartFile: First file in queue
SWF DEBUG: Event: uploadStart : File ID: SWFUpload_0_0
SWF DEBUG: Global Post Item: ASPSESSID=vaqoz045ecq3jg55uc22lv55
SWF DEBUG: File Post Item: videoID=undefined
SWF DEBUG: startFile(): File Reference found. File accepted by startUpload event. Starting upload to http://www.domain.com/UploadCompleted.aspx for File ID: SWFUpload_0_0
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 32768. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 655360. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 2555904. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 4292608. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 6324224. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 7700480. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 9666560. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 11304960. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 12976128. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 14352384. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 16384000. Total: 26195321
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 16777216. Total: 26195321

-- untill here in a second, hangs for a while and then: --

SWF DEBUG: Event: uploadError : IO Error : File ID: SWFUpload_0_0. IO Error.
SWF DEBUG: Event: uploadComplete : Upload cycle complete.