Method Community

As I was trying to Navigate through to trouble shoot I keep getting this error message :  Grid could not be generated . If this contiues please re-generate the screen or contact method staff.  Grid<table  width+"100% ><tr><td> <p> Currently there are no fields added to this grid. Please edit ...

How do I add Fields from one table to the screen of another Table .  My field is not showing up on my customer screen .  Please oh please help me .  P W.