CGI Script Error

The requested URL
http://www.spark-it.com/clients/index.cgi

returned this error:
Can't execute query:
INSERT INTO activity_log ( RIPN, Entry_Type, Entry_Date, Entry_Time, Board_ID, User, A, B, C, R_Port, R_Host, R_Agent, R_CPU, R_Lang, R_Accepts, P_Via, P_For, Referer, Details, AN ) VALUES ( ?, "Perl_Warning", ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 85743 ); .

Reason:
. Use of uninitialized value in string eq at /home/users/web/b2428/sl.bunjeecu/public_html/spark-it-com/public_html/cgi-bin/mbs_libs/mbs_http_lib.pm line 1969.

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