Coreldraw and problem converting an image into DXF

[Mcffee]

Hello, as a Xara user I'm quite new to Coreldraw and started using it for my new lasercutter. I managed a few times to successfully convert an image into a good DXF file, but with this one and many hours later it just doesn't work. Also don't understand why it freezes my pc, which never happens.

With this image I like to create little wooden clothing tags, the black part engraved and an outline to cut. With the DXF files I created so far the engraving part stays invisible for my laser software and I really can't figure out why. The comnversion doesn't work.

Any help is appreciated.