Importing ASCII Drainage File on Inroads

I have an ASCII drainage network file but is not successful in importing it in inroads.

Could somebody tell me what is wrong with my data and format? 

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BEGIN_FORMAT      
 PIPE_FORMAT {Pipe_id ent_id ent_ie ext_id ext_ie dia shape type}
 MANHOLE_FORMAT {Man_id top_elev}      
 NODE_FORMAT {node_id y x} 
END_FORMAT

PIPES         
 PIPE1  MH1  13.636  MH2  13.536  750  1  0
 PIPE2  MH2  13.536  MH3  13.436  750  1  0        
         
MANHOLES         
 MH1   16.0       
 MH2   15.0
 MH3   14.0
      
NODES          
 MH1   5515.050   1687.000      
 MH2   5515.050   1732.000
 MH3   5515.050    2032.000     

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Thank you very much.

By the way, i'm using Inroads v8i.

-chris