Delete Key only in Microstation not working

To whom it may concern,

something changed, and I'm not shure, if it had something to do with Microstation, the laptop or windows.

When activating an element I usually could delete it when pressing the delete key on the keyboard - this changed and I have to use the microstation delete button.

As this is only happening in Microstation and no other program it looks to me like a Microstation problem - am I right?

I'm still using windows 7, but I think this has nothing to do with it - seems to me as if I pressed a wrong button ....

Help appreciated.

Best Regards

Carsten