论坛水印无法使用

论坛注册验证码可正常使用,
后台开放论坛水印后,
在上传图片附件时提交跳转页,
会在顶部出现以下post.func.php信息,
切不可添加水印!
请教!!!
不知道各位使用4.0.0的有没遇见这个问题!

1. Warning: imagecreatefromgif(): './images/common/watermark.gif' is not a valid GIF file in /home/###/public_html/forum/include/post.func.php on line 135
   
2. 
   
3. Warning: imagesx(): supplied argument is not a valid Image resource in /home/###/public_html/forum/include/post.func.php on line 136
   
4. 
   
5. Warning: imagesy(): supplied argument is not a valid Image resource in /home/###/public_html/forum/include/post.func.php on line 137
   
6. 
   
7. Warning: imagealphablending(): supplied argument is not a valid Image resource in /home/###/public_html/forum/include/post.func.php on line 205
   
8. 
   
9. Warning: imagecopymerge(): supplied argument is not a valid Image resource in /home/###/public_html/forum/include/post.func.php on line 206

复制代码

怎么没人啊？？？
偶顶上去一下！