Question Literally imposible to remove GPU from old Motherboard

[pepete69]

Hey, i have to remove a gpu from an old mobo, but cant, i just dont understand how to. The mobo is a Biostar tz68a+

pic with the latch here:

I've tried moving the lock/latch every single way posible, but it just doesnt unlock.

 

[kerberos_20]

u move it to right side