PURCHASING PROBLEM

[niletra]

HI FRIENDS
I am facing one problem

accroding 2 following navi

PURCHASING>RFQ'QUATIONS>RFQ'
AND WHEN I CLICK ON SUPPLIER(TAB)

THERE IS A 4 FIELD

SEQ,SUPPLIER,SITE,CONTACT

SYSTEM ALLOW ME TO ENTER SITE AND SUPPLIER BUT I AM TRYING 2 ENTER CONTACT

FOLLOWING ERROR DISPLAY LIST OF VALUE CONTAIN NO VALUE..........

THOUGH I HAVE DEFINE CONTACT INFORMATION IN SUPPLIER AND SUPPLIER SITE PAGE
THANKS.....