Email Link lost

Hi there,
I am using Joomal 2.5.1 and Table JX. The WHERE Clause is lost sometimes but I fxied this with a database view.

What is really a problem is that E-mail adresses are shwon as links (via mailto:) only on the first page. When one goes to the next page the link (mailto:) is lost!

Any help is appreciated.

I have narrowed this further down: the email link gets always lost when table JX is used, i.e. when the user moves to the next page or reorders the colomns, or uses the search function.