Outline tracing problem in corel x5?

Hi. I am using corel draw X5.

I have jpg image.and import in coreldraw.

then right click on it. It gives outline tracing option, in it Line art option is display. click on it

and then i have proceed my process then ok. 

Now up to this , it is fine. and my one page is completed.

Then i have take second page. and proceed but it gives an error. and i have to close the coreldraw.

and again to reopen. and then i proceed it works. but again took third page it gave an error.

That means it proceed one page at a time then encounters an error.

What is the solution? Please.