can't get trans_status() to work

[eluser]dcallan[/eluser]
Hi there, for some reason I can't seem to get the below to work at all.

if ($this->db->trans_status() === FALSE)

I tried === true, === false, == true, === false and it didn't enter the block at all.

I'm using sqlsrv driver a member on here made available with CI 1.7
I seen someone posted a thread about this a while back but there was no resolution.

Could it be to do with the driver or might it be an internal CI thing.

Thanks in advance.