>I´m working with WIN95 as client and with WINDOWS NT 3.51 and Netware 3.11, calling a DOS program(written in Clipper and located in Netware) from within the .app , I have no problem. But when I call the same DOS program using RUN command I get the next message : "Incorrect DOS Version".

check your dos path and make sure it points to c:\windows\command. i had the same problem and believe it was because it was looking at files in the c:\dos directory and dos 7.0 didn't like it.