Windows SBS 2011 Installtion and Dynamic AX

Hello,

i have there server as Below..

A) Server 1= SBS2011

B) Server 2= SQL 2008

C) Server 3=Dynamic AX

now a days i have a problem in the sbs 2011 and i want to format the server and install SBS 2011 as fresh installation my question is what i have to do for the Dynamic

- is i need to reinstall the Dynamic again

note:

my problem just in the SBS 2011 ,Dynamic is working fine

Thanks