How long do CSA take?

I got my Decree Absolute in 2005, coming out of the divorce badly financially, but only just came across a letter from the CSA saying my ex was 9 weeks in arrears with child support. I think I overlooked it because it stated that I would have to pursue the claim myself, and I couldn't afford any more legal fees. However, I spoke to tha CSA last week, explaining my financial situation, and they agreed to take on the case. They were very hopeful about getting the money quickly, and said the arrears were actually 19 weeks. I rang today but was unable to speak to the caseworker, ( who had said she would speak to my ex today)and told by someone else that there was nothing new to report, and she would get in touch when there was. I am very upset, as the sum involved is considerable - £267 per week ( yes, he's a very wealthy man), and I told my bank that the money would probably be forthcoming. The person I spoke to today said that since my ex is self-employed, they would have to take him to court to recover the money, which could take months. Has anyone any experience of this, or any advice? Many thanks.

I myself have had battle's with the CSA , my ex has been 18 months in arrears he too is self employed i have been with the enforcement team since the begining of the year , got my first payment just before court 11 days ago won't hold my breath for any more.Due to my ex's arrears being of a large amount they have asked him to pay this amount within 2 yrs which he has refused to do , therefore they are obtaing a liability order.As i say 18 months and 1 payment i for 1 do not have much faith in the CSA.