[Bro] Trouble with ASYMETRIC FTP traffic

[Bindiya V S]

Hi,

  I am trying to analyze asymmetric (one sided) FTP traffic. I
 have added signatures for identifying FTP traffic, and FTP 
commands are getting properly identified. But I am facing 
problems when trying to analyze the FTP data traffic. When 227
 response comes, the function expect_connection is getting 
called. But it looks like the data connection is not getting 
identified after that.
  File_Analyzer::DeliverStream is not getting called for the 
data transfer.

Can some-body help me out?
I am waiting with my fingers crossed.

Thanks in advance
Bindiya :)