For which software is this a problem? If this is a progeCAD problem, we will move it to the progeCAD discussion...
As to the problem itself, sounds very much like a unique system problem of some sort - are you using a PC keyboard or running the problem on some kind of tablet? Are you accessing the software via remote connection (not supported)?
Please describe your system configuration.
progeCAD support, tips and troubleshooting forum. progeCAD works very similar to some versions of AutoCAD. Moderated.