#6 The major.minor version '49.0' is too recent

[Anonymous]

I`ve installed abaguibuilder-1.8 with jre1.5.0_06.
When I try to "save with compile" more error-Messages
are shown at the event-console:

Note: sun.tools.javac.Main has been deprecated.
error: Invalid class file format in .\abalib.jar
(ch/abacus/lib/ui/renderer/abaRenderer/AbaRendererInter
face.class). The major.minor version '49.0' is too
recent for this tool to understand.
C:\DOKUME~1\sven\LOKALE~1\Temp\transient3
\AbaRenderer_TEST1.java:6: Class
ch.abacus.lib.ui.renderer.abaRenderer.AbaRendererInterf
ace not found in import.
import
ch.abacus.lib.ui.renderer.abaRenderer.AbaRendererInterf
ace;

"The major.minor version '49.0' is too recent" how can
it be? And how can I fix the problem?

Thanx

Sven