empty preacct and accounting section

[WorkingMan]

I have been seen this weird message for two days now. I setup PPTP and IPSec 
(ikev1) with freeradius + mysql.

In both cases I see Access-Acccept and in Accounting-Request I see these two 
message:

WARNING: Empty preacct section. Using default return values.
WARNING: Empty accounting section. Using default return values.

I have no clue where it's wrong. PPTP can connect but IPSec connection would 
just keep sending Accounting-Request and never connects (it looks like 
connection depends on this step). The obvious consequence of this is that 
there is no accounting info in the DB (due to above warning).

I did have success when configuring both separately before. When I combine 
both together it seems to always cause issue. I am sure it's a configuration 
issue but I just can't see where the problem is. I saw a post related to this 
before but it had no resolution other than telling OP that his configuration 
was wrong.

One hint I have is the following log but I don't know what's the cause of it.

ignoring request with ID <id>, already processing
retransmitting RADIUS message
... #goes on for a while for IPSec, only twice for PPTP
RADIUS is not responding

Thanks