Remote Desktop keep asking for password

hi,

my name sony , i'm newcomer forum.

 

i have problem terminal service. i'm using windows 2008 standard edition sp2 , using web access share application microsoft dynamic nav. 

we using active directory in our company , has parent , child domain architecture. 

the scenario have 1 parent domain let abc.com have child domain child.abc.com

 

the client using windows xp, vista , 7 

 

right have 2 big problem:

1. 1 of user group in child.abc.com let groupsales@child.abc.com cannot access terminal service. user keep asking password password right. other group there no problem @ all. have tried using same computer in child domain , using different user in different user group. groupsales cannot access application

 

2. computer having weird behaviour. when tried connect application first time works. when connection broken , tried connect terminal service won't worked. have restart computer works again. in general each time computer connect first time work failed second time.

 

we not using isa server , not using ts session brooker. have include group group has access terminal service.

 

thank you

for problem number 2 happen pc using windows xp professional , rd connection shell version 6.1.7600, control version 6.1.7.600 , remote desktop protocol 7.0

 

Windows Server  >  Remote Desktop Services (Terminal Services)