Palm Treo 700w cannot be upgraded to NotifyLink Device Client version 4.6, nor can it be upgraded to Windows Mobile 6.
If you wish to continue using NotifyLink on a 700w you must maintain the 4.5 version of NotifyLink. The Treo 700w running NotifyLink Device Client version 4.5 will be supported until the next major release of the NotifyLink Device Client.
Please note that the Palm 700wx is a different model and can be upgraded to NotifyLink Device Client version 4.6.