jmeter problem

I was hoping someone would be able to tell me or at least give a me a hint on how to bypass or control the refresh variable on a system I am trying to test. It is a webbased system. I am using jmeter and when I record the activity all goes well however because the refresh variable reads that too much time has passed it automatically goes to "timeout" and all it returns (continually) is the login page. This is how it is supposed to behave for security reasons.
variables general appearance is "1068659690814" it appears to increase with each successful login. for now that is only manual. HELP PLEASE!!!!!!