Squid 2.7 problem with url

[Iojan Sebastian <basurerosebita@xxxxxxxxx>]

Hello
Going though squid in transparent mode
This url is loaded as text in the browser:
http://200.123.152.55/cgi-bin/ft.exe?q=images/edgedesk-logo-big.gif&site=clientes

Without squid loads an ugly images, but it loads.
I have used wget -S to see server headers, and they both put the 
content-type.
Now I notice that using squid even says Lenght, but connecting to server 
doesn't.
Does anybody have any clue?
Thanks in advance,
Sebastian

Ex:
With squid:
----------------
root@cache:/var/tmp/test# wget -S 
"http://200.123.152.55/cgi-bin/ft.exe?q=images/edgedesk-logo-big.gif&site=clientes";
--2012-03-09 17:41:13-- 
http://200.123.152.55/cgi-bin/ft.exe?q=images/edgedesk-logo-big.gif&site=clientes
Connecting to 127.0.0.1:31280... connected.
Proxy request sent, awaiting response...
HTTP/1.0 200 OK
Date: Fri, 09 Mar 2012 19:55:34 GMT
Server: Apache/2.0.54 (Fedora)
Content-Type: image/gif
Age: 2739
Content-Length: 4421
X-Cache: HIT from cache.netfly.com.ar
X-Cache-Lookup: HIT from cache.netfly.com.ar:31280
Via: 1.1 cache:31280 (Lusca/LUSCA_FMI)
Connection: close
Length: 4421 (4.3K) [image/gif]
Saving to: “ft.exe?q=images%2Fedgedesk-logo-big.gif&site=clientes.3”

100%[============================================================>] 
4,421 --.-K/s in 0s


Without:
------------
root@cache:/var/tmp/test# wget -S 
"http://200.123.152.55/cgi-bin/ft.exe?q=images/edgedesk-logo-big.gif&site=clientes";
--2012-03-09 17:42:50-- 
http://200.123.152.55/cgi-bin/ft.exe?q=images/edgedesk-logo-big.gif&site=clientes
Connecting to 200.123.152.55:80... connected.
HTTP request sent, awaiting response...
HTTP/1.1 200 OK
Date: Fri, 09 Mar 2012 20:38:28 GMT
Server: Apache/2.0.54 (Fedora)
Connection: close
Content-Type: image/gif
Length: unspecified [image/gif]
Saving to: “ft.exe?q=images%2Fedgedesk-logo-big.gif&site=clientes.4”

[ <=> ] 4,421 --.-K/s in 0s

2012-03-09 17:42:50 (19.3 MB/s) - 
“ft.exe?q=images%2Fedgedesk-logo-big.gif&site=clientes.4” saved [4421]