Auto-wait time out

Hi,

I am testing a Desktop application using TestComplete. I have to test the download of certain data from the Desktop application. The download process takes about 15minutes. TestComplete always terminates the application after about 3minutes and gives a message application not responding and it has been terminated. I have tried adding a Delay and also increasing the Auto-wait time out but still the application gets terminated. How can i get Testcomplete to wait for a certain period of time until the process is complete? 

I am using python script in TestComplete.

Thanks,

Vimal