Robohelp compilation error

Hi,

I am geeting the follwoing error when generating the chm file.

HHC4001: Warning:
The following alias line does not contain an '=' character  separating the topic IDs:  .

BMG_help.hhc
BMG_help.hhk
Throttling_Configuration.htm
SMS_Pull_Application_Management.htm
SMS_MMS_WAP_Messaging_.htm
Content_Provider_User_Management.htm
Quota_Management.htm
Content_Provider_Group_Account_Management.htm
Functionality.htm
Circle_Management.htm
System_Administration_.htm
Introduction.htm
BMG_User_Hierarchy.htm
Overview.htm
reference_documents.htm
Management_of_Services.htm
acronyms_and_abbreviations.htm
Multiple_User_Types.htm
Framework_to_Support_New_Interfaces.htm
MMS_Pull_Application_Management.htm
Multiple_Interfaces_Support.htm
Subscriber_Management.htm
Web_Interface.htm
External_Interfaces_Support.htm
Generation_of_CDRs.htm
Flexible_Billing_Definitions.htm
Message_Queuing.htm
Generation_of_Statistics_.htm
Subscription_Management.htm
Traffic_Reports.htm
Generation_of_Reports_.htm
Message_Scheduling.htm
Conversion_to_External_CDR_Format_.htm
Content_Provider_Profile_Database.htm
Service_Provisioning.htm
SNMP_Support_.htm
Management_of_Distribution_List_.htm
Push_Message_Flow.htm
Receiver_Agent.htm
OAM.htm
SNMP.htm
Processing_Agent.htm
Dispatcher_Agent.htm
Mediation_Gateway.htm
CDR_and_Report_Generation.htm
Law_Enforcement_Agency_(LEA).htm
Interface_Layers.htm
Network_Architecture.htm
Pull_Message_Flow.htm
Modifying_SMS_Quota.htm
managing_cp_account_quota_.htm
managing_cp_administrators.htm
viewing_content_providers.htm
modifying_cp_account_configuration.htm
creating_content_provider.htm
managing_content_provider_accounts.htm
modifying_wap_quota.htm
web-based_operations.htm
modifying_sms_messaging.htm
accessing_application.htm
modifying_mms_quota.htm
modifying_cp_user_configuration.htm
managing_cp_users.htm

Fatal  Error: Unexpected error from Microsoft HTML compiler.
Finished compiling  HTMLHELP in 39 sec(s)

Compilation complete.

why only to these htms i am getting the error?..what needs to be edited inthese htms?