How do I update my 10.7.1 to 10.7.2?

Hello Dear MAC users and genius and supportive people.

I been installing 10.7.1 since 2 weeks, but its look like fate is not in my favor. I downloaded the 10.7.1 updatecombo pack from apple UK site. then I tried to update my macbook, but every time I try to update it, it shows that "This volume does not meet the requirememnts for the updates" Now I have no idea when it is going wrong. I did read all the special comment how to resolve this, I also tried to repair the permissions and I also verify my disk. but the problem remain same. sorry if its a silly que but I have very limited knowledge in softwares.

Please file attached pic for the refrence. I can not do anything beyond this point.

Your help is much appriciated.

Kind Regards,

Deven