Unloading Reloading services

Hi all,

As a standard procedure we transport changes to wM interfaces through loading newer versions of existing packages. One particular package was updated successfully in one instance but in the other instance we have seen wM unloading and reloading the package many times.

Can anyone tell me why would wM do the unload-load steps?

Here is a type of the message:

2009-08-20 11:58:10 NZST [ISS.0028.0042C] Unloading B2Bi_ElixSAP_Interface package
2009-08-20 11:58:18 NZST [ISS.0028.0005C] Loading B2Bi_ElixSAP_Interface package

Thanks for the help,