To accomdate webpage in given Bandwidth

We r recently having facing this problem. Our webpage(local) is developed in Sql-ASP. The site has average size of 25KB. One of our company branch is connected to the server via 64 KBps line. The branch tried to access the access the site, for 1/2 connection it was ok. When more than 5 person accessed the site it is causing heavy traffic.
If I am right the BW 64 KB is not enough to handle the size of webpage (by simple calculation 25 * 5 =125 KBps). Is there any other way to overcome this? We cannot increase the BW for atleast timebeing… The website is Dynamic & interactive site.
Any compression or timeslot method can be used to solve this ? any tools avail ?
Kindly reply immedi.
Advance thanks.
arun