Hello vladyn,
I am sorry to hear you are running into this problem.
Do you have those file types defined in system/expressionengine/config/mimes.php? I am guessing that you do since the file field is successful, but can you double check?
It sounds like maybe your limit is good but that maybe execute time is not.
Check out these settings and compare with your settings.
memory_limit
This sets the maximum amount of memory in bytes that a script is allowed to allocate.
Default size 5.3 in is “8M”
post_max_size (must be greater than upload_max_filesize)
Sets max size of post data allowed. This setting also affects file upload.
Default size in 5.3 is “128M”
upload_max_filesize
The maximum size of an uploaded file.
max_execution_time
This sets the maximum time in seconds a script is allowed to run before it is terminated by the parser.
Default setting in 5.3 is “30”
You might try tweaking those settings for your needs.
Please let me know how that goes.
Cheers,