Can't see partition

I've 4 primary partitions on my drive.
I've resized the system partition (win 7) and the second one with gparted.
No problem with the first but the second is gone.
Disk management shows it but no way to format or change the drive letter.
What can I do ?
Thanks

can you give that partition a drive letter ?

tapuz said:

can you give that partition a drive letter ?

As I said I can't assign a drive letter.
All the options in disk management are NOT available.
When I try to format it gives me an error and ask me to reboot.

Vertex said:

Can you use Gparted again to detect this second partition??? Maybe you can use Gparted to format the partition again to a recognizable format by Windows such as NTFS and from there, maybe Windows can now detect it.

Already did it.
Even formatting with the windows install disk gets no result.
@whs
I'm under linux now so get a picture of disk management is a bit hard, but it's a common D/M window showing all the partitions (even the third that is a ext2 partition).
In the meanwhile I've tried diskpart with no more success