Cetin,
Your code worked in 1 sec.
However, Guid generated doesn't match what we currently have in our database:
2F14C33D340747AE
In other words, our GUID are always English letters and numbers and yours gives some unreadable chars.
Our code took 4 sec. for 1K recs.
If it's not broken, fix it until it is.
My Blog 
