(Washington, DC) -- Private government contractors who built the troubled Healthcare.Gov website are in the spotlight on Capitol Hill.

A House hearing is exploring problems with the new health insurance exchange website. The site has been riddled with technical problems since its launch this month. Cheryl Campbell, senior VP with CGI Federal, acknowledged difficulties and said her company is doing everything possible to fix the glitches. CGI is the lead contractor on the project. Campbell said those working on the site believed it was ready for launch October 1st. She insisted improvements are being made day-by-day.

Michigan Republican Fred Upton took issue with Campbell and said the website is clearly "not ready for primetime." Upton also said the probe is not aimed at assessing blame, "it's about accountability." October is the first month of a six month open enrollment period for the healthcare exchanges, one part of the healthcare reform law. The exchanges are primarily aimed at Americans who do not have employer-provided health insurance.

Pennsylvania Republican Joseph Pitts called the website launch an "unmitigated disaster." California Democrat Henry Waxman questioned the motives of Republicans, accusing them of doing everything imaginable to sabotage or delay Obamacare. Health and Human Services Secretary Kathleen Sebelius will testify in another House hearing next week.