Hello Sateesh
It may seem like a freeze, but if it is always realized, then it's apparently waiting for something. And once it gets it, project continues.
Is the connection local or over a WAN. Is it a large MPP? What version of project are you running? Have all the SP been applied? Is the behavior the same for others at the same location? Is it NT or Kerberos authentication?
Also, if the DNS is not working properly, there is a lot of network chatter and project spends time looking for the PWA site.
Just a few things to think about.
CHeers!
Michael Wharton, MBA, PMP, MCT
Sincerely, Michael Wharton, MBA, PMP, MCT, MCSD, MCSE+I, MCDBA www.WhartonComputer.com