Gnutella Forums - problems building phex from source

I am somewhat new to phex and am having some trouble building it from the source code. I have downloaded the source code for Phex 0.6.3 but when I go to use ant to built it, I get a Build failed. Here is some of the output that I get when I go to build it.

C:\phex_0.6.3_src>ant
Buildfile: build.xml

init:
[mkdir] Created dir: C:\phex_0.6.3_src\classes
[mkdir] Created dir: C:\phex_0.6.3_src\bin
[mkdir] Created dir: C:\phex_0.6.3_src\doc
[mkdir] Created dir: C:\phex_0.6.3_src\tmp
[mkdir] Created dir: C:\phex_0.6.3_src\webstart
[copy] Copying 23 files to C:\phex_0.6.3_src\classes\phex\resources

compile:
[javac] Compiling 224 source files to C:\phex_0.6.3_src\classes
[javac] C:\phex_0.6.3_src\src\phex\download\DownloadManage r.java:30: cannotresolve symbol
[javac] symbol : class Document
[javac] location: package dom
[javac] import org.w3c.dom.Document;
[javac] ^
[javac] C:\phex_0.6.3_src\src\phex\download\DownloadManage r.java:31: cannotresolve symbol
[javac] symbol : class XmlDocument
[javac] location: package tree
[javac] import org.apache.crimson.tree.XmlDocument;
[javac] ^
[javac] C:\phex_0.6.3_src\src\phex\query\ResearchServiceCo nfig.java:22: cannot resolve symbol
[javac] symbol : class Document
[javac] location: package dom
[javac] import org.w3c.dom.Document;
[javac] ^
.
.
.
[javac] C:\phex_0.6.3_src\src\phex\xml\XMLDownloadListXMLC odec.java:42: cannot resolve symbol
[javac] symbol : class Element
[javac] location: class phex.xml.XMLDownloadListXMLCodec
[javac] Element topElem = doc.createElement( "downloadlist" );
[javac] ^
[javac] Note: Some input files use or override a deprecated API.
[javac] Note: Recompile with -deprecation for details.
[javac] 100 errors

BUILD FAILED

C:\phex_0.6.3_src\build.xml:129: Compile failed, messages should have been provided.

Total time: 8 seconds

I know that ant is installed properly because I can use it to build LimeWire. I have also tried to build some other releases of phex but get the same problem