Question : Exchange Server 2003 install error

I have a Windows 2003 server setup as a PDC with Active Directories. When I attempt to install Exchange 2003 Enterprise I get the following error message;
"Setup failed while installing sub-component Microsoft Windows Active Directory schema update with error code 0xC103789A (please consult the installation log for a detailed description). You can cancel the setup or try the failed setup again."

The following is what apears on the error log.

Can anyone please help!!!!

[11:57:28] Entering CRegistryManager::ScProcessFile
[11:57:28] ++++ Starting interpreter on file f:\setup\i386\exchange\schema.ins ++++ -- ID:31258 --
[11:57:28] Interpreting line 86\exchange\bin;regsvr32.exe /i /n /s maildsmx.dll;4294967295> -- ID:31259 --
[11:57:28] Process created ... waiting (-1)
[11:58:15] Process has exited with 0x000005
[11:58:15] The command

      regsvr32.exe /i /n /s maildsmx.dll

failed, returning error code 5 (Access is denied.). -- ID:31136 -- ScCreateProcess (f:\titanium\admin\src\libs\exsetup\hiddenw1.cxx:1821)
           Error code 0XC103798A (31114): An internal component has failed.
[11:58:15]  CInsParser::ScProcessLine (f:\titanium\admin\src\libs\exsetup\hiddenw1.cxx:1225)
           Error code 0XC103798A (31114): An internal component has failed.
[11:58:15] Processing file 'f:\setup\i386\exchange\schema.ins', at or near line 8 (CreateProcess:f:\setup\i386\exchange\bin;regsvr32.exe /i /n /s maildsmx.dll;4294967295) -- ID:31111 -- CInsParser::ScProcessLine (f:\titanium\admin\src\libs\exsetup\hiddenw1.cxx:492)
           Error code 0XC103798A (31114): An internal component has failed.
[11:58:15] Registry file name: 'f:\setup\i386\exchange\schema.ins' CRegistryManager::ScProcessFile (f:\titanium\admin\src\udog\setupbase\tools\regmgr.cxx:125)
           Error code 0XC103798A (31114): An internal component has failed.
[11:58:15] Filename = 'f:\setup\i386\exchange\schema' CBaseAtom::ScAddRegistryKeys (f:\titanium\admin\src\udog\setupbase\basecomp\baseatom.cxx:1408)
           Error code 0XC103798A (31114): An internal component has failed.
[11:58:15]  CAtomSchema::ScAddRegistryKeys (f:\titanium\admin\src\udog\exsetdata\components\root\a_schema.cxx:318)
           Error code 0XC103798A (31114): An internal component has failed.
[11:58:15] Leaving CAtomSchema::ScAddRegistryKeys
[11:58:15]  CAtomSchema::ScAdd (f:\titanium\admin\src\udog\exsetdata\components\root\a_schema.cxx:150)
           Error code 0XC103798A (31114): An internal component has failed.
[11:58:15] Leaving CAtomSchema::ScAdd
[11:58:15] mode = 'ForestPrep' (61965) CBaseAtom::ScSetup (f:\titanium\admin\src\udog\setupbase\basecomp\baseatom.cxx:842)
           Error code 0XC103798A (31114): An internal component has failed.

Answer : Exchange Server 2003 install error

He has to be schema admin as well for the forest prep.