Warnings with SKPSMTPMessage

Warnings with SKPSMTPMessage

im starting app programming for iphone and now i have a problem with
skpsmtpmessage. in general it works fine but during compiling an linking,
i have 3 warnings
Warning (Semantic Issue) Sending 'SKPSMTPMessage *' to parameter of
incompatible type 'id'
Warning (Semantic Issue) Sending 'SKPSMTPMessage *' to parameter of
incompatible type 'id'
Warning (Semantic Issue) 4 enumeration values not handled in switch:
'NSStreamEventNone', 'NSStreamEventOpenCompleted',
'NSStreamEventHasSpaceAvailable'...
I use th SKPSMTP Message Framework i found in this forum. May sombody
knows this warnings and can help me.
THX in advance, KR, JoHn