Adding New Module

Hello all,
I am trying to write a script that will read in values from a datafile and then use that data to preform calculations on each capillary bridge between particles in a fluid bed. I am having trouble, however, employing my newly written module. I have the following line in the header file : PairStyle(cap/vis/field,CapViscHist) and have compiled lammps to include my .cpp and .h files, but I receive and unknown pair_style error when I try and run the input file. Any help would be much appreciated!

Carter Rhea