ssim logsoff while running a query

 hey, guys

i am having a problem while i am running a query on my ssim logs.

for somereason when i am running a query, usually it takes alot of time between: 1 hour and to 5 days.

when i am running my query and i press winkey+L.When  i come back to check out my results of my query .

i reveal that my ssim client logs off and i need to relogin and start all over again my query.

And i dont have any results.

what should i do?

how do i change the time of my client ssim logs off from the ssim server?

please guys,

help me