Missing data imputations - lack of pooled information in output

Problem

I have run several analyses in SPSS Statistics with a multiply-imputed data set, i.e. a data set that was created by the Multiple Imputation procedure in SPSS Statistics, which was supplied by a colleague.. The original data, with split file variable Imputation_ equal to 0, is followed by five imputed data sets. When I run Cox Regression, for example, pooled results should be available for the Regression coefficients and for the covariate means. (See the SPSS Help topic "Analyzing Multiple Imputation Data" for a list of pooled statistics for each procedure.) However, Cox Regression on imputed data is printing model coefficients for the original data and for each of the created (imputed) data sets. The output should also provide a final model line that displays the Pooled, or combined, model representing a summary of all the imputation models. This combined model uses a complex algorithm to compute the necessary SEs, adjusting for the imputations. Unfortunately, my output does not provide a Pooled model line. Since this is imputation data and split file variable, Imputation_, is spelled correctly, why is the pooling not performed?