I series with that divider switch in the trunk is the "roof open" switch found in the top assembly just above the passenger's right ear. It has a slider actuator. Check it out.
Also, there is another micro-switch on the trunk latch assembly.
So :
1. divider must be in place
2. top must be in released position
3. trunk must be closed and latched
otherwise, no hydraulic pump and a flashing top light.

In the below link, you should find the 2005 SRT6 Service Manual, it has all the schematics and troubleshooting procedures for the convertible top.
( or direct link to that manual : http://www.jodykrivohlavek.com/_docu...ice_Manual.pdf