[Tugindia] Ligure problem in Font

[Ragu]

Dear TUGIndia,

I likes to know the various possibility to generate TFM files from PFM/PFB font files. Usually, i am using FontLab to make the changes to my PFM/PFB files.
When i generate TFM from PFA files, i come across some ligature problem.

For example, ff, fl and fi are showing different characters in my DVI.

I need some more assistants from you.

With Warm Regards
S.Ragu