CSV Export only exports first record (24448)

## Describe the bug
This is a copy of Issue 24448 form CodePlex.

> **Can't Export Data**
> Hi, 
> When I export the data to excel all I get are the column headers. I don't get any data. How can I fix that? 

## Software Versions
- DNN: 06.02.07
- Module: 04.70.00
