Avatar don't showing up

[User 80882]

I change "Default Avatar Dimensions" and now avatar don't showing up.
In HTML there's no dimensions:

<img src="/images/default_avatar.jpg" alt="" width="0" height="" />

And I have errors when I try upload new avatar:

Type: 2
File: inc/functions_image.php (Line no. 94)
Message
imagealphablending() expects parameter 1 to be resource, boolean given

Type: 2
File: inc/functions_image.php (Line no. 95)
Message
imagefill() expects parameter 1 to be resource, boolean given

Type: 2
File: inc/functions_image.php (Line no. 98)
Message
imagesavealpha() expects parameter 1 to be resource, boolean given

Type: 2
File: inc/functions_image.php (Line no. 95)
Message
imagecolorallocatealpha() expects parameter 1 to be resource, boolean given

How can I fix it?

[Destroy666]

You didn't tell us the most important info - which "Default Avatar Dimensions" are you using? It should be X|Y where X and Y are integers.

[User 80882]

Doesn't matter which dimensions I use (100|100 or 180|120 ect.). Avatar showing up only if I leave blank this input.

[Destroy666]

Considering also this thread: http://community.mybb.com/thread-159788.html I'm quite sure you're installation is messed up. Please send me a temporary Admin CP account's details on PM so I can check what's wrong.

[User 80882]

I don't know why but I added max dimensions in wrong format (separate with "|" instead "x"). Sorry