Some Windows Mobile 5 and 6 devices have a hardware keyboard that you can use to enter text, instead of using a stylus with the software input panel (SIP). On such devices, M-Business Client installs with the SIP disabled; only the hardware keyboard can be used to enter text. If you wish to use the SIP and stylus instead, you can switch to that input mode—see the documentation that came with your device for instructions on switching input modes.