Hey buddy
This is the most common problem with those f***ing slim drives. And it is cause of the bad head. No any f/w level tool or software can help you in this case, as you need the data. so, in this case, you can try these two things one after one:
1. The tapping method (Really, It does revives those slim drives often....)
2. Head Swap (Though, it should be your last try, as there is high risk that you would screw up the drive's remaining stability !)
If you need help, you can contact me personally, as you know my yahoo ID.
Regards
harddiskbug@yahoo.com