Brain-Dead Newbie - SQL Question

Any help is sincerely appreciated:I have data in a table that represents the following:Admin Visit Type            Registration Date         Discharge Date D                                    20050301                  20050301D                                    20050301                  20050301W                                   20050301                  20050301E                                    20050301                  20050301D                                    20050301                  20050302W                                   20050301                 20050303W                                   20050301                 20050311D                                    20050301                 20050301Patient Type is always and I for the records I want but there are also Patient Types = O which I don't care about..What I would like to do is accoumlate a counter on the number of Registrations per date as well as Discharges per date.There can be thousands of registrations per day as well as thousands of discharges per day.  So lets say I want to pass a date parameter to accumulate the total registrations and discharges per day.  I have beat my head against the desk for the last two days because I believe this is a simple query but I just cannot get the results I want  - so any help is greatly appreciated.   I have written the following sql but I do not get a sum of the total registrations and discharges and EXPR3 and Expr4 always equal each other which is not the case .  For example on 20040301 I have 88 registrations and 17 discharges but I can't ever get the correct totals...I wrote the following in Query Analyzer - but it does not work and I have went around in circles and have tried so many things I am just frustrated.........Declare @Parm_Beg_Date as nvarchar(8)Set @Parm_Beg_Date = 20040313

SELECT

Patient_Visit_Result_Master.PVR_Admin_Visit_Type,Patient_Visit_Result_Master.PVR_Patient_Type, Patient_Visit_Result_Master.PVR_Registration_Date,Patient_Visit_Result_Master.PVR_Discharge_Date, Count(Distinct(Patient_Visit_Result_Master.PVR_Registration_Date)) as Expr3,Count(Distinct(Patient_Visit_Result_Master.PVR_Discharge_Date)) as Expr4

FROM         Patient_Visit_Result_Master INNER JOINPatient_Visit_Result_Master Patient_Visit_Result_Master_1 ON Patient_Visit_Result_Master.PVR_Hospital_ID = Patient_Visit_Result_Master_1.PVR_Hospital_ID  AND @Parm_Beg_Date = Cast(Patient_Visit_Result_Master_1.PVR_Registration_Date as nvarchar(8))or@Parm_Beg_Date = Cast(Patient_Visit_Result_Master_1.PVR_Discharge_Date as nvarchar(8))

WHERE     (Patient_Visit_Result_Master.PVR_Admin_Visit_Type = 'E') AND (Patient_Visit_Result_Master.PVR_Patient_Type =  'I')  AND (Cast(Patient_Visit_Result_Master.PVR_Registration_Date as nvarchar(8)) = @Parm_Beg_Date)  OR    (Patient_Visit_Result_Master.PVR_Admin_Visit_Type = 'D') AND (Patient_Visit_Result_Master.PVR_Patient_Type =  'I')  AND (Cast(Patient_Visit_Result_Master.PVR_Registration_Date as nvarchar(8)) = @Parm_Beg_Date)

 Or (Patient_Visit_Result_Master.PVR_Admin_Visit_Type = 'W') AND (Patient_Visit_Result_Master.PVR_Patient_Type =  'I') and (Cast(Patient_Visit_Result_Master.PVR_Discharge_Date as nvarchar(8)) = @Parm_Beg_Date)

 Or (Patient_Visit_Result_Master.PVR_Admin_Visit_Type = 'D') AND (Patient_Visit_Result_Master.PVR_Patient_Type =  'I') and (Cast(Patient_Visit_Result_Master.PVR_Discharge_Date as nvarchar(8)) = @Parm_Beg_Date)

GROUP BY Patient_Visit_Result_Master.PVR_Admin_Visit_Type,Patient_Visit_Result_Master.PVR_Patient_Type, Patient_Visit_Result_Master.PVR_Registration_Date,Patient_Visit_Result_Master.PVR_Discharge_Date

Order By Patient_Visit_Result_Master.PVR_Admin_Visit_TypeThanks in advance