mrtg no graph

[Vu Pham]

I just installed mrtg from yum install mrtg. The results are shown on
the web server but there is no graph at all. All the output are just
text as pasted below.

I checked the lib gp, zlib, and png are installed.

Any idea ?

Thanks,

Vu


Weekly' Graph (30 Minute Average)
week

       Max
     Average
     Current
        In
2988.0 B/s (0.2%)
2005.0 B/s (0.2%) 
2989.0 B/s (0.2%) 
       Out
8512.0 B/s (0.7%) 
5018.0 B/s (0.4%) 
8512.0 B/s (0.7%) 
`Monthly' Graph (2 Hour Average)
month

       Max
     Average
     Current
        In
0.0 B/s (0.0%)
0.0 B/s (0.0%) 
0.0 B/s (0.0%) 
       Out
0.0 B/s (0.0%) 
0.0 B/s (0.0%) 
0.0 B/s (0.0%) 
`Yearly' Graph (1 Day Average)
year

       Max
     Average
     Current
        In
0.0 B/s (0.0%)
0.0 B/s (0.0%) 
0.0 B/s (0.0%) 
       Out
0.0 B/s (0.0%) 
0.0 B/s (0.0%) 
0.0 B/s (0.0%)