Issue with restart of weblogic server again and again

Hi All, I am newbie in  soa suite(11.1.1.7), which is installed  on my local machine.On first day, it worked very fine but later on it created an serious issue that it goes down automatically.
And every time I have to stop the server and then restart.
Please resolve my issue. The log message is as follows :

90498)--Thread(Thread[[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.De

fault (self-tuning)',5,Pooled Threads])--Connection released to connection pool

[read].

[EL Finest]: 2013-05-23 15:51:25.028--ServerSession(2028897604)--Thread(Thread[[

ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)',5,

Pooled Threads])--Execute query ReadAllQuery(name="soa-infrafile:/C:/Oracle/Midd