help with permissions

During an applet execution based on JAI libraries after compiling the
..java file I get the following problem.
What to do?
Thanks in advance...

Alessandro

java.lang.Excep tionInInitializ erError

at javax.media.jai .OpImage.<init> (OpImage.java:2 30)

at javax.media.jai .PointOpImage.< init>(PointOpIm age.java:374)

at javax.media.jai .PointOpImage.< init>(PointOpIm age.java:404)

at javax.media.jai .NullOpImage.<i nit>(NullOpImag e.java:108)

at javax.media.jai .NullOpImage.<i nit>(NullOpImag e.java:156)

at VisorTiff.init( VisorTiff.java: 46)

at sun.applet.Appl etPanel.run(Unk nown Source)

at java.lang.Threa d.run(Unknown Source)

Caused by: java.security.A ccessControlExc eption: access denied
(java.util.Prop ertyPermission java.home read)

at java.security.A ccessControlCon text.checkPermi ssion(Unknown Source)

at java.security.A ccessController .checkPermissio n(Unknown Source)

at java.lang.Secur ityManager.chec kPermission(Unk nown Source)

at java.lang.Secur ityManager.chec kPropertyAccess (Unknown Source)

at java.lang.Syste m.getProperty(U nknown Source)

at com.sun.media.j ai.util.Propert yUtil$1.run(Pro pertyUtil.java: 99)

at java.security.A ccessController .doPrivileged(N ative Method)

at com.sun.media.j ai.util.Propert yUtil.getFileFr omClasspath(Pro pertyUtil.java: 124)

at javax.media.jai .OperationRegis try.initializeR egistry(Operati onRegistry.java :360)

at javax.media.jai .JAI.<clinit>(J AI.java:382)