SQL TimeOut Exception after 15-20 Hours of Continuous Run

Hi,

I am getting SQL Time out exception after long run of 15-20 Hours, Please find the attachment for more details.

My SQL queries  are not taking much time for execution , simple Update /Insert statements to local database.

Observed Activity manager also, looks fine.

One more application connected to same database (Insert statements)works fine.

In connection string I have modified Connection string ConnectTimeout = 2147483647; (max)

regards

Venkatesh