Parser Error Message: Unknown server tag

[Fred]

Hi!!
Im trying to use the solution described in the article Dealing with
images in content management systems
http://www.codeproject.com/aspnet/ImageCMS1.asp?df=100&forumid=271809&exp=0&select=1752388

But when i try to run, i receive the follow error:

Parser Error Message: Unknown server tag 'guild:WebImageMaker'.

Source Error:

Line 11:
Line 12:
Line 13:
Line 14: CancelButtonText="Cancel" ConfirmButtonText="OK"
UploadButtonText="Go!"
Line 15: ImageWidth="203" ImageHeight="250"


Source File: /webimagemaker/Default.aspx Line: 13


How can i fix this problem?

Thanks!

 

[Fred]

If i use Visual Web Developer i dont have problems but when i put the
files in a server i receive the error .