
                                                                    EXHIBIT 23.1

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

     As independent public accountants, we hereby consent to the incorporation
of our reports included in this Form 10-K, into the Company's previously filed
Registration Statement on Form S-8 on October 16, 1997 File No. 333-38011 and
the Company's previously filed Registration Statement on Form S-4 on April 2,
1999 File No. 333-75595.

ARTHUR ANDERSEN LLP

Houston, Texas
March 15, 2000
