I'm having an issue mining LTC as well. BTC is working well for me. I'm just using nvidia gtx460m so want to mine LTC with it.
My bat file I've tried dozens of different ways, here's one example:
"setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer -o stratum+tcp://notroll.in:3333 -u buysolar.3 -p 12345 --scrypt --gpu-platform 0 -I 0"
when i run it this is the error i get:
[2013-04-09 03:14:08] Started cgminer 2.11.4
[2013-04-09 03:14:09] :678: error: no matching overload found for arguments of
type 'unsigned int __attribute__((ext_vector_type(4))), unsigned int'
B = EndianSwap(tmp);
^~~~~~~~~~
:687: error: no matching overload found for arguments of type 'unsigned int __a
ttribute__((ext_vector_type(4))), unsigned int'
B[i+4] = EndianSwap(tmp);
^~~~~~~~~~
:700: error: no matching overload found for arguments of type 'unsigned in [2013
-04-09 03:14:09] Failed to init GPU thread 0, disabling device 0
[2013-04-09 03:14:09] Restarting the GPU from the menu will not fix this.
[2013-04-09 03:14:09] Try restarting cgminer.
Press enter to continue:
Please help, thank you.
I'm not shure, but it's some kinda problem with GPU, nVidia - is worst choise for mining. Try to change -I param (set it 1 then 2 then 3), and delete "--gpu-platform"