Four things:
1. Not reliable. Complain me delay to join the phone conferece for 
half an hour this sunday early morning at 12:30am.
2. Did't corporate with a sub-manager the manager assinged to manage me, an
indian son of *****.
3 Multitasking. I joined this company 4 months ago. and have finished 4 
projects by now. Still can't make him satisfied.
4. Didn't maintain good relationship with networking group. When I was 
working on building the new site for the company, the networking group 
delayed to deliver the networking connectivity for 4 weeks. I pushed them to
deliver. and they are not happy. My manager asked me to finish the project 
in 2 weeks, that is supposed to be finished in one and half month. And this 
happened after I joined the company for one month.
 
Background:
Thank you so much for advices.
This letter is from my manager, who assigned the Indian guy to manage me. 
Before this issue, there is no any oral warning.
I didn't get any half-year evaluation. I entered this company in July 2010.
Signing this letter means I agreed and understood what the letter said.
After I entered this company, I found out that my manager is very tough and 
the whole group messed up. Higher IT administration never thinks this group 
works. Before I came in, one guy just left and one guy changed to another 
group. My manager entered this group about one and half years ago after the 
previous manager of this group got fired due to mess-up things in this group
. But my manager always yelled to everyone in this group. So about two 
months ago, two senior guys (this group only has three members, two senior 
guys and me) along with other group guys complained my manager to HR about 
his altitude to his colleagues.
Sincerely I do have fault.
1. I delayed to log into the conference call scheduled at midnight hour for 
half an hour.
2. Didn't follow up with the indian properly.
But in the complaint letter, at least two items listed are not true.
After the official meeting with my manager and the indian, I talked to my 
manager one-to-one. He said this letter is not a procedure to kick out you, 
but just wanted you to perform better. Whether or not you got kicked out 
depends on him. If I improved my performance, he would keep me. He said that
very nicely. But I am not sure if this is his trick to convince me to sign 
the letter and not to complain to HR.
So now I am not sure if I should talk to HR or just simply sign it.