Hello, help please

I am a amateur user of Poser pro 2010

It seems to have developed a fault.

The rendering process does not seem to come to an end.

Example

I open a new file, no models loaded,  and press the render icon.

The program starts to render and the blue strip goes all the way to the end but the render process never stops and eventually I have to cancel the rendering and shut the program down.

I restart Poser and go to the render menu and restore defaults, it renders Ok, but when I make a change such as untick gamma or load a model it goes back to never stopping rendering.

Any help or advice appreciated.

The last change  I made I loaded the glowflies model

Thanks in advance

Without seeing a screencap of your actual render settings it will be difficult to determine where the exact problem is occurring.  

Sorry for not coming back sooner, problem seems to have solved itself, thanks for answering