Connectria's Managed Hosting Services for Ameren's Website Ranked 1st In Performance Among Industry Peers

ST. LOUIS, MO (December 1, 2003) - Connectria Corporation today announced that the sophisticated web infrastructure that it hosts and manages for Ameren Corp. (www.ameren.com) has been ranked No. 1 among 19 utility Web sites based on its response time in a survey conducted by Gomez Performance Network that appeared in Platt's Energy Business & Technology magazine. The strength of these results is directly attributable to the exceptional response time and performance of Connectria's IT infrastructure and services.

The Web site's response time, or the number of seconds it takes to download an entire Web page, was 0.92 seconds, compared to 1.76 seconds for the No. 2 site. Ameren's site also ranked exceptionally high for availability, and was available 99.89 percent of the time the survey showed. The benchmark response time was 3.04 seconds and the availability was 99.14 percent.

About Ameren Corp.
With assets of $14.7 billion, Ameren Corp. (NYSE: AEE) owns a diverse mix of electric generating plants strategically located in its Midwest market with a capacity of more than 14,600 megawatts. Ameren serves 1.7 million electric customers and 500,000 natural gas customers in a 49,000 square-mile area of Missouri and Illinois.

About Connectria
Connectria is a profitable and growing global provider of complex hosting and managed hosting services. Connectria offers an array of hosting services for companies of all sizes across a wide range of technologies, including Enterprise Applications, Software as a Service (SaaS), HIPAA Compliance Support, Data Center Outsourcing, Disaster Recovery and Cloud Computing. A privately held company, Connectria has built its business through reinvesting profits and without equity financing. Connectria operates world-class Data Centers, Network Operations Centers, and Engineering Centers located in St. Louis, Missouri and Philadelphia, Pennsylvania. From these facilities, Connectria operates as a virtual extension of its clients' IT organizations. http://www.connectria.com

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