Thank you, that fixed the size problem.
But now I get the following error message regrading the file type. I have set exe as a valid file type in the host settings, and it is listed here amongst the valid file extensions.
The File Is A Restricted File Type. Valid File Types Include ( *.swf, *.jpg, *.jpeg, *.jpe, *.gif, *.bmp, *.png, *.doc, *.xls, *.ppt, *.pdf, *.txt, *.xml, *.xsl, *.css, *.zip, *. exe, *.zip ). Please Contact Your Hosting Provider If You Need To Upload A File Type Which Is Not Supported
Thanks for any help.