loader.asp loading small files but not large files

[Fazimoto]

Hi I have a problem with uploading files to my server through an admin system. I myself do not really work with ASP scripting much, so I don't understand the problem. When uploading files like thumbnails there seems to be no problem with the script, but when trying to upload the bigger images it does not work and gives me an Internal server error 500 (There is a problem with the resource you are looking for, and it cannot be displayed.) The loading script that is used is call LOADER.ASP and as said before using small files, the script uploads fine and all entries are made into the the database just fine.If anyone could just give me a hint to why this might happen or what could be the cause for giving the error it woulds realy helpThank you