Withdrawing money from a site

[James Bliss]

I really hope someone can answer this.I tried to withdraw most of the money from my online poker site, and they said they wouldn't grant me a withdrawal until quote "half of what you've deposited has been played at the site".I've been playing micro limits there for 9 months! I've made a profit of about $100. I've deposited about 1100. Please someone explain what they mean!! Please!