acbTaskMan was written for the .Net Compact Framework version 1.0. You may be running with only the Compact Framework version 2. Even though the Compact Framework is supposed to be backward compatible, there are some occassional problems with the newer framework. If you do not have the latest service pack (SP3) for the Compact Framework, please download it from Microsoft.
Why does acbTaskMan not display my power usage?
Some devices do not have hardware support for monitoring power usage. On these devices, there is no way for acbTaskMan to access this data. If this feature is essential, be sure to try acbTaskMan for free before purchasing.