When i try to install AquaTerm on Snow leopard from MacPorts i got this:

--->  Computing dependencies for aquaterm
--->  Building aquaterm
Error: Target org.macports.build returned: shell command "cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_aquaterm/work/aquaterm" && /usr/bin/xcodebuild  -target "AquaTerm" -configuration Deployment build OBJROOT=build/ SYMROOT=build/ MACOSX_DEPLOYMENT_TARGET=10.6 ARCHS=x86_64 SDKROOT= USER_APPS_DIR=/Applications/MacPorts FRAMEWORKS_DIR=/opt/local/Library/Frameworks" returned error 1
Command output: [WARN]Warning: The Copy Bundle Resources build phase contains this  target's Info.plist file 'AquaTerm.framework-Info.plist'.
CopyPlistFile build/Deployment/AquaTerm.framework/Versions/A/Resources/AquaTerm.framework-Info.plist AquaTerm.framework-Info.plist
cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_aquaterm/work/aquaterm
/Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copyplist AquaTerm.framework-Info.plist --outdir /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_aquaterm/work/aquaterm/build/Deployment/AquaTerm.framework/Versions/A/Resources

error: can't exec '/Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copyplist' (No such file or directory)
Command /Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copyplist failed with exit code 71
Command /Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copyplist failed with exit code 71

=== BUILD NATIVE TARGET AquaTerm OF PROJECT AquaTerm WITH CONFIGURATION Deployment ===
Check dependencies
Warning: Multiple build commands for output file /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_aquaterm/work/aquaterm/build/Deployment/AquaTerm.app/Contents/Resources/help.html
[WARN]Warning: Multiple build commands for output file /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_aquaterm/work/aquaterm/build/Deployment/AquaTerm.app/Contents/Resources/help.html
CopyTiffFile build/Deployment/AquaTerm.app/Contents/Resources/Cross.tiff English.lproj/Cross.tiff
cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_aquaterm/work/aquaterm
/Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copytiff English.lproj/Cross.tiff --outdir /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_aquaterm/work/aquaterm/build/Deployment/AquaTerm.app/Contents/Resources

error: can't exec '/Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copytiff' (No such file or directory)
Command /Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copytiff failed with exit code 71
Command /Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copytiff failed with exit code 71
** BUILD FAILED **


The following build commands failed:
AQTFwk:
 CopyPlistFile /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_aquaterm/work/aquaterm/build/Deployment/AquaTerm.framework/Versions/A/Resources/AquaTerm.framework-Info.plist AquaTerm.framework-Info.plist
AquaTerm:
 CopyTiffFile /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_aquaterm/work/aquaterm/build/Deployment/AquaTerm.app/Contents/Resources/Cross.tiff English.lproj/Cross.tiff
(2 failures)


Error: Status 1 encountered during processing.
Before reporting a bug, first run the command again with the -d flag to get complete output.

How i can solve this problem?