can not install service pack of autocad mechanical

[Mylife0310]

Dear all

Please help me in this case.

I have download the file from this link :

http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=17125406&linkID=9240898

I try to install but I can not. my friend can install

Please see the message in attached files.

Thanks

[SBix26]

- do you have AutoCAD Mechanical 2011 installed?

- do you have Update 1 installed?

- do you have the correct version of the update (32-bit / 64-bit)?

[Mylife0310]

-I have installed autocad mechanical and it run ok

-I have update the first one before. I try to install it again but have the same message

-the verson is correct 64 bit

thanks