Problem in linking IS-H customer to FI Customer

HI All,

I have created FI customer with account group KOST (Insurance Provider).

But, when I enter FI customer number in IS-H customer of the insurance provider, I get the error:

"In table TN02A, no entry for inst. XXXX and logical application from TN02E".

What could be the reason for this?

Thanks in advance

regards

Kumar