XP Connectivity problem

Hi. I am getting a connectivity error when accessing a medical software application from a xp client to a windows 8 server pc. Other xp clients are successful. User is created on the windows pc. Firewall is off. Please see error below:
Application:
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1.1 Start Date : Mon, 31 Mar 2014 11:20:14 +0200
1.2 Name/Description: PMO.exe - (Professional Medical Office Client )
1.3 Version Number : 3.9.2.222
1.4 Parameters :
1.5 Compilation Date: Wed, 16 Oct 2013 13:24:12 +0200
1.6 Up Time : 30 minutes, 50 seconds

Exception:
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2.1 Date : Mon, 31 Mar 2014 11:51:04 +0200
2.2 Address : 005CD5E0
2.3 Module Name : PMO.exe - (Professional Medical Office Client)
2.4 Module Version: 3.9.2.222
2.5 Type : EOleSysError
2.6 Message : Access is denied.
2.7 ID : 4600
2.8 Count : 1
2.9 Status : New
2.10 Note :

User:
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3.1 ID : <NAME REMOVED BY MODERATOR>
3.2 Name : MSP002
3.3 Email :
3.4 Company :
3.5 Privileges: SeChangeNotifyPrivilege - ON
SeSecurityPrivilege - OFF
SeBackupPrivilege - OFF
SeRestorePrivilege - OFF
SeSystemtimePrivilege - OFF
SeShutdownPrivilege - OFF
SeRemoteShutdownPrivilege - OFF
SeTakeOwnershipPrivilege - OFF
SeDebugPrivilege - OFF
SeSystemEnvironmentPrivilege - OFF
SeSystemProfilePrivilege - OFF
SeProfileSingleProcessPrivilege - OFF
SeIncreaseBasePriorityPrivilege - OFF
SeLoadDriverPrivilege - ON
SeCreatePagefilePrivilege - OFF
SeIncreaseQuotaPrivilege - OFF
SeUndockPrivilege - ON
SeManageVolumePrivilege - OFF
SeCreateGlobalPrivilege - ON
SeImpersonatePrivilege - ON

Active Controls:
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4.1 Form Class : TfrmLogin
4.2 Form Text : PMO Login
4.3 Control Class: TButton
4.4 Control Text :

Computer:
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5.1 Name : REKENINGE
5.2 Total Memory : 3431 Mb
5.3 Free Memory : 2103 Mb
5.4 Total Disk : 74.53 Gb
5.5 Free Disk : 19.02 Gb
5.6 System Up Time: 3 hours, 5 minutes, 8 seconds
5.7 Processor : Intel(R) Pentium(R) 4 CPU 3.00GHz
5.8 Display Mode : 1280 x 720, 32 bit
5.9 Display DPI : 96
5.10 Video Card : Tul Corporation, RADEON 9250 (driver 8.231.0.0 - RAM 256 MB)
5.11 Printer : HP LaserJet Professional M1217nfw MFP (driver 2010.0331.1.19178)

Operating System:
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6.1 Type : Microsoft Windows XP
6.2 Build # : 2600
6.3 Update : Service Pack 3
6.4 Language: English
6.5 Charset : 0

Network:
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7.1 IP Address: 192.168.000.050
7.2 Submask : 255.255.255.000
7.3 Gateway : 192.168.000.001
7.4 DNS 1 : 192.168.000.001
7.5 DNS 2 : 008.008.008.008
7.6 DHCP : OFF

Custom Information:
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8.1 -Customer info- :
8.2 Customer.Name :
8.3 Customer.ID :
8.4 Customer.UserCount :
8.5 -Server Info- :
8.6 Facade.Version :
8.7 Facade.Server filename :
8.8 Facade.Manager server name :
8.9 Manager.Version :
8.10 Manager.Filename :
8.11 Manager.Dataaccess server name:
8.12 Dataaccess.Version :
8.13 Dataaccess.Filename :
8.14 Dataaccess.Connection string :
8.15 Database Version :
8.16 -Session info- :
8.17 LoginUser.DataID : -1
8.18 LoginUser.ID : -1
8.19 LoginUser.Name : Err
8.20 UnitID : -1
8.21 UnitName : Err
8.22 PartyIndex : -1
8.23 FacadServer : Err
8.24 Ticket : Err