error in gambit application

MER

Hi, I have installed exceed on my Pc and run Gambit. I have received an error message like this:

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:. Received X Intrinsics Warning <Cannot convert string "-adobe-helvetica-bold-r-*- *-12-*-*-*-*-*-*" to type FontStruct>. Received X Intrinsics Warning <Unable to load any usable ISO8859-1 font>. Received X Intrinsics Warning <

Name: FONTLIST_DEFAULT_TAG_STRING

Class: XmRendition

Conversion failed. Cannot load font.
:.

This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information.

----------------------------------------------------- I have tried to reinstall exceed another time but the problem remain. could any one help me. thanks.