dynamic zoom and dynamic pan

i download intellicad 2000 v2.2 and we tested it in windows 95,98,pentium 4 128mb ram32mb video card i notice that its too slow went iam dynamically zoom in and out and dynamically panning. is there a solution to my problem? our company is looking for alternative cad software and intellicad in the most closes to autocad i hope you resolve the problem...