Perhaps it has something to do with GD on your server? Is this turned on?

got info:
script: %2Fadmin%2Fassets%2FEditForm%2Ffield%2FFiles%2FUploadifyForm%2Ffield%2FUploadedFiles%2Fupload%3FSecurityID%3D53869e58bf34ce494bc3dfaf476d98fae2002206%26ctf%5BFiles%5D%5Bstart%5D%3D0%26ctf%5BFiles%5D%5Bper_page%5D%3D10%26ctf%5BFiles%5D%5Bshowall%5D%3D0%26ctf%5BFiles%5D%5Bsort%5D%3DSortOrder%26ctf%5BFiles%5D%5Bsort_dir%5D%3D%26ctf%5BFiles%5D%5Bsearch%5D%3D%26ctf%5BFiles%5D%5Bfilter%5D%3D%26ctf%5BFiles%5D%5Bview%5D%3D
refreshlink: /admin/assets/EditForm/field/Files/UploadifyForm/field/UploadedFiles/refresh?SecurityID=53869e58bf34ce494bc3dfaf476d98fae2002206&ctf[Files][start]=0&ctf[Files][per_page]=10&ctf[Files][showall]=0&ctf[Files][sort]=SortOrder&ctf[Files][sort_dir]=&ctf[Files][search]=&ctf[Files][filter]=&ctf[Files][view]=
uploader: /uploadify/javascript/uploadify.swf
scriptAccess: sameDomain
queueSizeLimit: 40
auto: 1
fileExt: *.*
fileDesc:
cancelImg: /uploadify/images/cancel.png
image_class: Image
file_class: File
buttonText: Upload files
queueID: UploadifyFieldQueue_UploadedFiles
wmode: transparent
hideButton: 1
upload_on_submit:
sortable:
sizeLimit: 67108864
multi: 1
scriptData:

gd
GD Support enabled
GD Version bundled (2.0.34 compatible)
FreeType Support enabled
FreeType Linkage with freetype
FreeType Version 2.2.1
GIF Read Support enabled
GIF Create Support enabled
JPG Support enabled
PNG Support enabled
WBMP Support enabled
XBM Support enabled

Hmm, info looks normal. So the original picture gets, but the resized image is not created... Strange...

also the silverstripe logo what is @ start in folder is broken when u insert it

can it be problem that i don have silverstripe cache folder.

Do you have access to any php error log? This could be a memory issue maybe?

5.3.3 CGI
5.2.14 SAPI
5.2.14 CGI

can use those php versions @ moment its 5.2.14 CGI

and php is

register_globals: on
magic_quotes_gpc: on
short_tags: on
allow_url_fopen: on
session.auto_start off

Someone recently wrote that they turned magic_quotes_gpc to off, but I'm not sure it will help. It didn't help me. What about safe_mode?

I'm using php 5.2.13 by the way, works fine.