Generating slots in PCB

Hello,

I am not able to generate slots in PCB.

Instead of creating slots, it is creating drilled holes which is causing errors in my final assembly.

I am using Altium 2012 for generating .brd and .pro of IDF 3.0 version.

Can any one advice anything on this ?

Regards,

Nitin Bothra

SolidworksCircuitworks