cannot batch process a maxima file in texmacs

Hi,
   I am unable to batch process a maxima file (attached in the end) in 
texmacs. The command I used is

batch("filename");

All the statements get executed but in the end I am not getting the 
command prompt so I cannot input new commands. In the status bar (at the 
right bottom) of texmacs the error message shown is

generic maxima program roman 10 [busy]

I tried the same program with xmaxima and everything works fine. So I am 
assuming it is a problem with texmacs. But I would like hear the 
conclusions from experts than deducing them myself. In any case, how can 
I get it to work in texmacs?

I am using debian sid updated daily, maxima 5.9.1, texmacs 1.0.4.

thanks in advance
raju

Attached file: chebyshev.mac