How to edit my profile email ID

Hi All,

Not sure if this is correct place to put post this ,please let me know if this should be posted somewhere else.
I had made my profile on gmatclub in 2005 it had my rediff email id which I have stopped using ,now I want to update it to my yahoo id.
When I enter my yahoo ID , I get a message that my email ID is already ready registered. When I hit "forgot pw" with my yahoo email ID , I get a message that this email ID does not exist.


Can anyone please help ?

Cheers!
Apoorva