A problem with compiling UDF file in fluent 13.0.

I have a problem with compiling UDF file in fluent 13.0. I imported the 2D computational mesh of my model in .nas format from COMSOL. I loaded it into Fluent. I then tried to compile the UDF with a sequence: Define>User-defined>funtcions>compiled. I then loaded the required file with the .c extension, clicked Build and then Load and this message appears:

The UDF library you are trying to load (C:\Program Files (x86)\Elektroaero\Comsol-Fluent\libudf) is not compiled for 2ddp on the curent platform (win64). The system cannot find the specified path. C:\Program Files (x86)\Elektroaero\Comsol-Fluent\C:\Program Files (x86)\Elektroaero\Comsol-Fluent\libudf\win64\2ddp\libudf.dll.

Anyone have an idea how to solve this problem.

Kind regards

Rafał