cgminer Rejected as lowdifficulty I got an issue with cgminer constantly rejecting shares. How can I fix it?

Here's example rejection (note that Diff jumps - sometimes it's 6/1 sometimes it's 1/1) :

[2013-04-09 14:24:05] Rejected fe26cac1 Diff 4/1 GPU 0 (lowdifficulty)


Here's the .bat file I use:

cgminer --scrypt -o eu-stratum.btcguild.com:3333 -u MyUser -p 123


My OS is Win 7 32 bit.
I had this issue also the fix for me was  adding--scrypt -o to the beginning so it look like this :

--scrypt -o stratum+tcp://stratum.scryptguild.com:3333  -u iwantcoins_nick -p nopw --load-balance