Access Database

Hi,
I have two independent sites connexted via wan link, 128kb line. I have a 3.5 meg access database on one site. The second site accesses this database over the 128kb wan link. Clients are complaining that the database is very slow when they try to access it over the wan. Is there any way I can configure this access dtabase for wan use, or are there any suggestions or solutions to this problem.
Comments will be appreciated