GD-png / picasso problem

[Lionel]

Hello Argus users,

I'm facing a problem with Argus graphing system.

I've installed argus3.6, gd-2.0.28, libpng-1.2.35 and perl-GD-2.41 and
i'm getting the following errors within apache2 :

[Fri Feb 27 13:47:21 2009] [error] [client <ip_addr>] gd-png:  fatal
libpng error: Invalid number of colors in palette, referer: .....
[Fri Feb 27 13:47:21 2009] [error] [client <ip_addr>] gd-png error:
setjmp returns error condition, referer: ......
[Fri Feb 27 13:47:21 2009] [error] [client <ip_addr>] Can't call
method "line" without a package or object reference at
/usr/local/lib/argus/Chart/Strip.pm line 329., referer: .....
[Fri Feb 27 13:47:21 2009] [error] [client <ip_addr>] picasso failed.
cannot generate graph image., referer: ....

Did anybody face the same issue before me?....

Thanks in advance,
/L.