ciao ragazzi
sto installando un cms fatto in java, ma al momento dell'installazione mi dà questo problema:

codice:

Giving up, unable to start OpenCms.
7: Critical error while loading driver manager.
6: The following critical error occured:

at org.opencms.setup.CmsSetupWorkplaceImportThread.ru n(CmsSetupWorkplaceImportThread.java:209)
32: at org.opencms.setup.CmsSetupWorkplaceImportThread.ki ll(CmsSetupWorkplaceImportThread.java:118)
31: at org.opencms.main.CmsShell.exit(CmsShell.java:557)
30: java.lang.NullPointerException
29: at org.opencms.setup.CmsSetupWorkplaceImportThread.ru n(CmsSetupWorkplaceImportThread.java:194)
28: at org.opencms.main.CmsShell.start(CmsShell.java:646)
27: at org.opencms.main.CmsShell.executeCommands(CmsShell .java:818)
26: at org.opencms.main.CmsShell.executeCommand(CmsShell. java:743)
25: ${user}@${project}>java.lang.NullPointerException
24: ${user}@${project}># Turn echo on
23: ... 5 more
22: at org.opencms.db.CmsSecurityManager.init(CmsSecurity Manager.java:2711)
21: at org.opencms.db.CmsDriverManager.init(CmsDriverMana ger.java:4307)
20: at org.opencms.db.generic.CmsProjectDriver.fillDefaul ts(CmsProjectDriver.java:668)
19: at org.opencms.db.generic.CmsVfsDriver.writeResource( CmsVfsDriver.java:2826)
18: at org.opencms.db.generic.CmsVfsDriver.internalReadPa rentId(CmsVfsDriver.java:3030)
17: Caused by: org.opencms.file.CmsVfsResourceNotFoundException: Unable to read parent id of resource "[B@d2efa1".
16: at org.opencms.setup.CmsSetupWorkplaceImportThread.ru n(CmsSetupWorkplaceImportThread.java:155)
15: at org.opencms.main.CmsShell.<init>(CmsShell.java:450 )
14: at org.opencms.main.OpenCmsCore.upgradeRunlevel(OpenC msCore.java:1692)
13: at org.opencms.main.OpenCmsCore.initConfiguration(Ope nCmsCore.java:1117)
12: at org.opencms.db.CmsSecurityManager.newInstance(CmsS ecurityManager.java:156)
11: at org.opencms.db.CmsSecurityManager.init(CmsSecurity Manager.java:2720)
10: org.opencms.main.CmsInitException: Critical error while loading driver manager.




mi sapreste dire che tipo di problema è??