Failed to convert parameter value from a String to a Int32.

Question

when i try to insert from front end it is showing 

Failed to convert parameter value from a String to a Int32.  this error

when i try to pass the values with sp

--[usp_InsertMerchantBanks2] 'INDUSIND','INDB0001437',159491992426,'K JAYA SAI PRAKASH','HYDERABAD' 
values are inserting from front end not inserting  how can i do it help me..

button click 

protected void btnSubmit_Click(object sender, EventArgs e)
{
    try
    {

        BankList bankList = new BankList();
        bankList.BankName = txtBankName.Text;
        bankList.IFSC = TxtIFSCCode.Text;
        bankList.ActNumber = (long)Convert.ToDouble(TxtActNumber.Text);
        bankList.ACCHolderName = TxtAccHolderName.Text;
        bankList.BranchName = TxtBranchName.Text;
        bankBLL.InsertMerchantBanks(bankList);
    }    
    catch(Exception ex)
    {
        throw ex;
    }
}

my bll

public bool InsertMerchantBanks(BankList bankList)
{
    try
    {
        return oBankDAL.InsertMerchantBanks(bankList);
    }
    catch(Exception ex)
    {
        throw ex;
    }
    finally
    {

    }
}

mydal

public bool InsertMerchantBanks(BankList bankList)
{
    bool oInsertBankDetails = new bool();
    try
    {
        List<SqlParameter> objSQLParameterCollection = new List<SqlParameter>();
        objSQLParameterCollection.Add(new SqlParameter { ParameterName = "@BankName", SqlDbType = SqlDbType.NVarChar, Value = bankList.BankName });
        objSQLParameterCollection.Add(new SqlParameter { ParameterName = "@IFSC", SqlDbType = SqlDbType.Int, Value = bankList.IFSC });
        objSQLParameterCollection.Add(new SqlParameter { ParameterName = "@ActNumber", SqlDbType = SqlDbType.BigInt, Value = bankList.ActNumber });
        objSQLParameterCollection.Add(new SqlParameter { ParameterName = "@ACCHolderName", SqlDbType = SqlDbType.NVarChar, Value = bankList.ACCHolderName });
        objSQLParameterCollection.Add(new SqlParameter { ParameterName = "@BranchName", SqlDbType = SqlDbType.NVarChar, Value = bankList.BranchName });

        oInsertBankDetails = oSQLHelper.ExecuteNonQuery(DBProcedures._SP_InsertMerchantBanks, objSQLParameterCollection);
    }
    catch (Exception e)
    {
        throw e;
    }
    return oInsertBankDetails;
}

my db

create table MerchantBanks2
(
BankName		nvarchar(200) not null,
IFSC			nvarchar(80) null,
ActNumber	    bigint null,
ACCHolderName	nvarchar(200) null,
BranchName		nvarchar(150) null
CONSTRAINT PK_BN PRIMARY KEY(BankName) 
)



create procedure usp_InsertMerchantBanks2
(
@BankName		nvarchar(200),
@IFSC			nvarchar(80) null,
@ActNumber	    bigint null,
@ACCHolderName	nvarchar(200),
@BranchName		nvarchar(150)
)
as 
begin
insert into MerchantBanks2(BankName,IFSC,ActNumber,ACCHolderName,BranchName) values(@BankName,@IFSC,@ActNumber,@ACCHolderName,@BranchName)
end