Community 's Tab to section lyfecycles does not work

Hello,
after installing RAM 7.5.0.1 I was not able to access the Lifecycles TAB under Administration (i.e. link to section lyfecycles) for all the communities: the page specified by the link (http://my_ram_server:13080/ram/admin/group/review.faces?gid=1011) seems not available!
I tried to check the RAM configuration but everything seems fine. I tried also to use several different browsers without success.
Details :
Environment: RAM 7.5.0.1
Websphere embedded / DB2 9.7.1
Windows Server 2008 Enterprise (x86 64)
Is this a bug?
after installing RAM 7.5.0.1 I was not able to access the Lifecycles TAB under Administration (i.e. link to section lyfecycles) for all the communities: the page specified by the link (http://my_ram_server:13080/ram/admin/group/review.faces?gid=1011) seems not available!
I tried to check the RAM configuration but everything seems fine. I tried also to use several different browsers without success.
Environment: RAM 7.5.0.1
Websphere embedded / DB2 9.7.1
Windows Server 2008 Enterprise (x86 64)
Is this a bug?