File manager is not uploading file while using Alias name instead of actual domain

Hi,

I have Agile 9.3.3 installed in our machine. Our Agile example URLs are given below

http://pc123.abc.com:7001/Agile/PCMServlet

In my windows host file i have given one new alias name as

127.0.0.1 pc123.abc.com ALIAS agile933

now i am able to access Agile application with alias URL - 

http://agile933:7001/Agile/PCMServlet with no .com

but when i try to upload a file, accessing application from the alias url results in showing error in file transfer box. everything else is working fine with alias url

also i have noticed j_username and j_password cookies are not getting set when I am using alias URL, but I am able to navigate through Application pages only File Manager is not working.