Firewall rule created, but firewall drops

Hello everyone,

I have a Dell Notebook from work with Vista (it's in a domain and firewall
settings are configured by group policy).
At home I have a XP SP2 machine.

I'm able to connect with Vista to XP. I tried everything I know, but it
doesn't work from XP to Vista.

If I try by UNC or IP I always get "Network Path was not found"

On Vista machine, the private profile is active at the moment. I tried rules
with "any port, any profile, etc. with just entering source and destination
ips" and set it to allow, but doesn't work.

The firewall log shows dropped stuff:
#Fields: date time action protocol src-ip dst-ip src-port dst-port size
tcpflags tcpsyn tcpack tcpwin icmptype icmpcode info path

2007-04-15 11:43:39 DROP TCP 10.11.12.57 10.11.12.53 4256 445 52 S
3100445053 0 64240 - - - RECEIVE
2007-04-15 11:43:39 DROP TCP 10.11.12.57 10.11.12.53 4258 139 52 S
3282638340 0 64240 - - - RECEIVE
2007-04-15 11:44:12 DROP TCP 10.11.12.57 10.11.12.53 4262 445 52 S
2424182988 0 64240 - - - RECEIVE
2007-04-15 11:44:12 DROP TCP 10.11.12.57 10.11.12.53 4264 139 52 S
1652083414 0 64240 - - - RECEIVE
2007-04-15 11:44:15 DROP TCP 10.11.12.57 10.11.12.53 4262 445 52 S
2424182988 0 64240 - - - RECEIVE
2007-04-15 11:44:15 DROP TCP 10.11.12.57 10.11.12.53 4264 139 52 S
1652083414 0 64240 - - - RECEIVE
2007-04-15 11:44:21 DROP TCP 10.11.12.57 10.11.12.53 4262 445 52 S
2424182988 0 64240 - - - RECEIVE
2007-04-15 11:44:21 DROP TCP 10.11.12.57 10.11.12.53 4264 139 52 S
1652083414 0 64240 - - - RECEIVE

Port rules with 139 and 445 set to allow don't work either.

I also noticed, that the time of the log entries is about 20 minutes ahead
of the system times of both machines. Don't know where it gets the wrong
time...

I'm really sorry for bad english, I apreciate every single try to solve my
problem

thanks
Stefan