Colour change when exporting from Corel Draw to PDF

Hey Guys!

I really really need some help.

I have created a document using Corel Draw. 

The document consists of an image in the background and a box over it with transparency effect.

Now the colors seem perfect on screen. However, when I export it to a PDF, all the colors are getting messed up. 

I do not understand why this is happening and I have practically used up all the ideas I had.

The document would be printed and sent as a PDF in emails too.

To make it universally usable, I had made the entire design in CMYK color.

This is how it looks on my computer screen on Corel Draw

This is how it looks when im exporting the file.

Do you see the change in the red color??

Its happening the same with all other colors too on the other pages.

I have used a transparency effect > substract - to get this color tone.

I really hope someone can help me solve this problem.

Dhruv