Contact groups on os 4.2

[Rinku]

Hi, I've upgraded to Os 4.2 and suddenly lost
All my contacts but recovered them later
By Microsoft exchange but currently I'm
Not able to save my contacts under the required
Groups.
I'm able to create groups but not
Save the contacts under groups . I've used
Various Softwares like abc groups, my groups,
Gcontacts, .... But all are giving me the
Same problem.

Can u please help me with this???