Java Security

Hi all..
I'm having this problem while trying to "sign" a jar.. I think the problem is in the manifest file, i'ts all on one line

Manifest-Version: 1.0
Main-Class: tchn.login.UpdateManager
Class-Path: DMtchn/DMlib/RMtotdSgn.jar DMtchn/DMlib/RMl2fprod-common-totdSgn.jar DMtchn/DMlib/RMcommons-httpclient-3.0-rc4Sgn.jar DMtchn/DMlib/RMformsrtSgn.jar DMtchn/DMlib/RMl2fprod-common-allSgn.jar DMtchn/DMlib/RMxml-apisSgn.jar DMtchn/DMlib/RMxerces_2_5_0Sgn.jar DMtchn/DMlib/RMitext-1.3.1Sgn.jar DMtchn/DMlib/RMcommons-logging-apiSgn.jar DMtchn/DMlib/RMcommons-codec-1.3Sgn.jar DMbatik/RMbatik-awt-utilSgn.jar DMbatik/RMbatik-bridgeSgn.jar DMbatik/RMbatik-cssSgn.jar DMbatik/RMbatik-domSgn.jar DMbatik/RMbatik-extSgn.jar DMbatik/RMbatik-extensionSgn.jar DMbatik/RMbatik-gui-utilSgn.jar DMbatik/RMbatik-gvtSgn.jar DMbatik/RMbatik-parserSgn.jar DMbatik/RMbatik-scriptSgn.jar DMbatik/RMbatik-svg-domSgn.jar DMbatik/RMbatik-svggenSgn.jar DMbatik/RMbatik-swingSgn.jar DMbatik/RMbatik-transcoderSgn.jar DMbatik/RMbatik-utilSgn.jar DMbatik/RMbatik-xmlSgn.jar DMbatik/RMjsSgn.jar DMbatik/RMpdf-transcoderSgn.jar DMjdic/RMjdicSgn.jar DMjdic/RMjdic_stubSgn.jar DMjdic/RMpackagerSgn.jar DMtchn/DMlib/RMjasperreports-1.2.7Sgn.jar DMtchn/DMlib/RMcommons-beanutils-1.5Sgn.jar DMtchn/DMlib/RMcommons-collections-2.1Sgn.jar DMtchn/DMlib/RMcommons-digester-1.7Sgn.jar RMLoginSgn.jarRMKernelSgn.jarRMFrmSgn.jarRMJfrmSgn.jar RMDbBeanSgn.jar RMActDetSgn.jar RMActEmiSgn.jar RMActionSgn.jar RMActMDetSgn.jar RMActMDisSgn.jar RMActMEmiSgn.jar RMActMEneSgn.jar RMActMetSgn.jar RMActMRepSgn.jar RMActMSpcSgn.jar