Click View, Summary Console then try start
It will show you the Command Line command it is sending to the miner.
Copy and paste it here
2013-04-09 22:00:29: Running command: C:\Users\Master\Desktop\guiminer Scrypt\cgminer\cgminer.exe --scrypt -u 6135870.11 -p 132 -o stratum+tcp://us-pool.give-me-ltc.com:80 --gpu-platform 0 -d 0 -w 128 -v 1 -I 18 -g 1 -l 1 -T -v -w128 -f 25 --thread-concurrency 3200
2013-04-09 22:00:29: Listener for "Default" started
2013-04-09 22:00:29: Listener for "Default": [2013-04-09 22:00:29] cgminer.exe: -v: Invalid value passed to set_vector
2013-04-09 22:00:58: Listener for "Default" shutting down