Can’t run existing Access reports on W2K

When I try to run existing Access 97 reports from any db on my W2K Adv Server box, I get this error right after I dbl click. [The instruction at “0x77fca1f7” referenced memory at “0x10c020ba”. The memory could not be “written.”]. On a similar PC,the reports work fine (the dbs’ are on the network, so it is the exact same reports). I can create a new report, save it and run it fine. Everything else works fine also, such as queries and forms. I have un/reinstalled Office and have W2K SR1 installed. I have swapped memory chips as well, just in case. Ideas?