[Q] decompiling error

hey,

im trying to decompile apks using apkmanage 5.0.2. but every time im geting this error.

java version "1.7.0_21"
Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
Java HotSpot(TM) Client VM (build 23.21-b01, mixed mode, sharing)
Could Not Find C:\Users\agri\Desktop\Apk_Manager_5.0.2\place-apk-here-for-modding\../place-apk-here-for-modding/signedFlashBarService.apk
Could Not Find C:\Users\agri\Desktop\Apk_Manager_5.0.2\place-apk-here-for-modding\../place-apk-here-for-modding/unsignedFlashBarService.apk
I: Baksmaling...
I: Loading resource table...
W: Config flags size > 32. Exceeding bytes: -7FFE0000.
W: Invalid config flags detected. Dropping resources: dimen-xhdpi-v13-ERR0
I: Loaded.
I: Loading resource table from file: C:\Users\agri\apktool\framework\1.apk
W: Config flags size > 32. Exceeding bytes: 0000D002.
W: Invalid config flags detected: dimen-v13-ERR1
W: Could not decode attr value, using undecoded value instead: ns=android, name=versionCode, value=0x00000001
I: Loading resource table from file: C:\Users\agri\apktool\framework\1.apk
W: Config flags size > 32. Exceeding bytes: 0000D002.
W: Invalid config flags detected: dimen-v13-ERR2
W: Could not decode attr value, using undecoded value instead: ns=android, name=versionName, value=0x0000000f
Exception in thread "main" java.lang.NullPointerException
at java.io.Writer.write(Unknown Source)
at brut.androlib.res.util.ExtMXSerializer.writeAttrib uteValue(ExtMXSerializer.java:38)
at org.xmlpull.mxp1_serializer.MXSerializer.attribute (MXSerializer.java:673)
at org.xmlpull.v1.wrapper.classic.XmlSerializerDelega te.attribute(XmlSerializerDelegate.java:106)
at org.xmlpull.v1.wrapper.classic.StaticXmlSerializer Wrapper.writeStartTag(StaticXmlSerializerWrapper.j ava:267)
at org.xmlpull.v1.wrapper.classic.StaticXmlSerializer Wrapper.event(StaticXmlSerializerWrapper.java:211)
at brut.androlib.res.decoder.XmlPullStreamDecoder.dec ode(XmlPullStreamDecoder.java:46)
at brut.androlib.res.decoder.ResStreamDecoderContaine r.decode(ResStreamDecoderContainer.java:34)
at brut.androlib.res.decoder.ResFileDecoder.decode(Re sFileDecoder.java:100)
at brut.androlib.res.AndrolibResources.decode(Androli bResources.java:114)
at brut.androlib.Androlib.decodeResourcesFull(Androli b.java:93)
at brut.androlib.ApkDecoder.decode(ApkDecoder.java:98 )
at brut.apktool.Main.cmdDecode(Main.java:120)
at brut.apktool.Main.main(Main.java:57)

im really new to editing apk files. any help would be appreciated. thanks in advance.