Variable issue in crystal report

Hi Experts,

I hope you are doing the good job and i developed the BEX report which is developed 3 variables , one of the variable is in navgational attribute and remain 2 attributes in char which is working fine  and we developed the crystal report on top of bex query  its working fine after that  as per requirement i changed navgational attribute and variable .Now the crystal report is not showing the variable prompt which i build on Nav attribute.So plz pass your inputs on this issue.

Regards

RK