Hibernate version:3.0 beta4

Mapping documents:build.xml

I downloaded Hibernate 3, beta 4, and I cannot get it to compile. Any help is appreciated. I am using the ant build.xml file that came with the download, and have pointed my classpath var to jdk1.5/bin. Here is the stacktrace:

compile:
[javac] Compiling 225 source files to C:\hibernate-3.0\build\classes
[javac] C:\hibernate-3.0\src\org\hibernate\impl\CollectionEntry.java:120: ca
nnot find symbol
[javac] symbol : method infoString(org.hibernate.collection.CollectionPersi
ster,java.io.Serializable)

[javac] location: class org.hibernate.pretty.MessageHelper
[javac] MessageHelper.infoString( getLoa
dedPersister(), getLoadedKey() )
[javac] ^
[javac] C:\hibernate-3.0\src\org\hibernate\impl\CollectionEntry.java:290: ca
nnot find symbol
[javac] symbol : method infoString(org.hibernate.collection.CollectionPersi
ster,java.io.Serializable)
[javac] location: class org.hibernate.pretty.MessageHelper
[javac] String result = "CollectionEntry" + MessageHelper.infoSt
ring(loadedPersister, loadedKey);
[javac] ^
[javac] C:\hibernate-3.0\src\org\hibernate\impl\CollectionEntry.java:292: ca
nnot find symbol
[javac] symbol : method infoString(org.hibernate.collection.CollectionPersi
ster,java.io.Serializable)
[javac] location: class org.hibernate.pretty.MessageHelper
[javac] result += "->" + MessageHelper.infoString(curren
tPersister, currentKey);
[javac] ^
[javac] C:\hibernate-3.0\src\org\hibernate\impl\EntityEntry.java:133: cannot
find symbol
[javac] symbol : method getNullifiables()
[javac] location: interface org.hibernate.engine.SessionImplementor
[javac] session.getNullifiables(
)
[javac] ^
[javac] C:\hibernate-3.0\src\org\hibernate\impl\PersistenceContext.java:753:
cannot find symbol
[javac] symbol : method infoString(org.hibernate.collection.CollectionPersi
ster,java.io.Serializable)
[javac] location: class org.hibernate.pretty.MessageHelper
[javac] MessageHelper.infoString(persist
er, lce.key)
[javac] ^
[javac] C:\hibernate-3.0\src\org\hibernate\impl\PersistenceContext.java:770:
cannot find symbol
[javac] symbol : method infoString(org.hibernate.collection.CollectionPersi
ster,java.io.Serializable)
[javac] location: class org.hibernate.pretty.MessageHelper
[javac] MessageHelper.infoString(persist
er, lce.key)
[javac] ^
[javac] 6 errors