Unable to Mine litecoin

it was working perfectly fine and i am trying to connect to coinotron and getting error...able to mint bitcoin but not litecoin any idea why here is the error

2013-04-04 00:44:36: Running command: C:\Users\cgminer\cgminer.exe --scrypt -u username -p pwd-o stratum+tcp://coinotron.com:3334 --gpu-platform 1 -d 0 -w 256 -v 1 -I 20 -g 1 -l 1 -T --thread-concurrency 20992
2013-04-04 00:44:36: Listener for "Default" started
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:44:36] Started cgminer 2.11.3
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:44:37] ADL found less devices than opencl!
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:44:37] There is possibly more than one display attached to a GPU
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:44:37] Use the gpu map feature to reliably map OpenCL to ADL
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:44:37] WARNING: Number of OpenCL and ADL devices did not match!
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:44:37] Hardware monitoring may NOT match up with devices!
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:44:37] Probing for an alive pool
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:45:37] No servers were found that could be used to get work from.
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:45:37] Please check the details from the list below of the servers you have input
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:45:37] Most likely you have input the wrong URL, forgotten to add a port, or have not set up workers
2013-04-04 00:45:37: Listener for "Default": [2013-04-04 00:45:37] Pool: 0 URL: stratum+tcp://coinotron.com:3334 User: username Password: pwd

was working perfect then suddenly nothing ....

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